2:1 AV When the day of Pentecost was fully come. The affirmative articles of the Nicene Creed of 325 conclude with the words “and in the Holy Spirit,” with no further explanation.1 But it was the expansion of these words about the doctrine of the Holy Spirit in the closing articles of the Niceno-Constantinopolitan Creed of 381 that made the latter creed a full-blown confession of the Trinity in a way that the creed of 325 had not been, which